文献类型：期刊文献

英文题名：Creep reliability assessment of structural components at elevated temperatures considering the time dependent feature of representative stress

作者：Fu, Jin-Hui[1];Zhang, Zhai[2];Zhu, Kun-Ping[3];Wang, Chun-Ming[4];Gong, Jian-Guo[1];Zhao, Peng[1];Xuan, Fu-Zhen[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety MOE, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Shanghai Nucl Engn Res & Design Inst Co Ltd, Shanghai 200233, Peoples R China;[3]East China Univ Sci & Technol, Sch Math, 130 Meilong Rd, Shanghai 200237, Peoples R China;[4]China Nucl Power Engn Co Ltd, Beijing 100048, Peoples R China

年份：2024

卷号：310

外文期刊名：ENGINEERING FRACTURE MECHANICS

收录：;EI(收录号：20243717018632);WOS:【SCI-EXPANDED(收录号:WOS:001325551400001)】；

基金：Supports from National Natural Science Foundation of China (No.: 52175139) and State Administration for Market Regulation Science and Technology project (No.: 2022MK031) are greatly acknowledged.

语种：英文

外文关键词：Creep; Reliability assessment; Stress relaxation; Representative stress; Sensitivity analysis

摘要：Creep reliability assessment of structural components at elevated temperatures is essential to guarantee the long-term safe operation of the system. Current studies are limited to continuum damage mechanics methods at the material level, while the reliability assessment method for creep design at the component level is rarely reported. In this work, the framework for creep reliability assessment of structural components is extended, where the time dependent feature of the representative stress is included. The effect of the time dependent feature of the representative stress on creep reliability assessment is discussed. Sensitivity analyses of material parameters on creep reliability assessment results are conducted based on the Sobol and Morris global methods. Results indicate that for the same creep design life, the component presents a higher failure probability when the time dependent feature of the representative stress is considered. Parameters D and d in the creep rupture life equation have more significant effects on creep rupture life than other parameters for the case studied.